DSH Remote Access

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@xiaosenho/dsh-plugin-remote-access is an installable bundle for the DeepSeek Harness Web profile. It adds a Remote Access settings section, starts LAN access or an frpc tunnel on demand, and produces authenticated links for controlling the full Web UI from another computer, tablet, or phone.

Install

Install from npm:

dsh plugin --profile web add @xiaosenho/dsh-plugin-remote-access

Install a local checkout:

dsh plugin --profile web add ./dsh-plugin-remote-access

Pin a commit when installing from a Git repository:

dsh plugin --profile web add github:xiaosenho/dsh-plugin-remote-access#<commit>

A Git install runs this package's prepare build. pnpm initially refuses an unapproved dependency build; follow the dsh diagnostic, allow the package in the Web profile's pnpm-workspace.yaml, then repeat the install:

allowBuilds:
  '@xiaosenho/dsh-plugin-remote-access': true

This permission lets the dependency execute build code on the host. Install only trusted source and pin a commit. An npm release or tarball containing lib/ needs no Git prepare permission.

LAN access

1. Start dsh --profile web and open Settings > Remote access.
2. Select LAN, choose the local port, save, and enable the connection.
3. Copy the displayed link and open it on another device in the same LAN.

The token in the link is an access credential. The first request exchanges it for an HttpOnly, SameSite=Strict cookie and removes the token from the address bar. Disabling, re-enabling, or changing an active configuration revokes the old link.

Tunnel access

The host must provide an frpc executable compatible with the server's frps version. The plugin resolves frpc from PATH by default. Override the path and process limits in the Web profile's cordis.patch.yml when needed:

- id: remote-access
  config:
    listenPort: 3081
    frpcPath: /opt/homebrew/bin/frpc
    processGraceMs: 3000
    frpcStartupTimeoutMs: 500
    frpcOutputMaxBytes: 32768
    requestMaxBytes: 16384

Select Tunnel in Settings and provide:

• Server address: the frps control hostname or IP.
• Server port: frps.bindPort, commonly 7000.
• server.token: the same token configured as [auth].token on the server.
• Public endpoint: choose Domain or IP + port.
• Domain: choose HTTP or HTTPS and enter the authority users open, such as https://dsh.example.com.
• IP + port: enter the public frps IP and the dedicated remotePort, such as 203.0.113.10:18080.

Domain mode creates an HTTP-type frpc proxy with customDomains. Public HTTP can use frps.vhostHTTPPort directly. For public HTTPS, terminate TLS at a server-side reverse proxy or load balancer and forward to the frps HTTP vhost; this plugin does not present the local Web UI as a TLS origin. IP + port mode creates an frp TCP proxy and sets remotePort, so users open http://<public-ip>:<remote-port> without DNS. The frps allowPorts policy must permit that port. Direct IP mode is HTTP-only; use Domain mode with a trusted certificate for HTTPS.

The plugin also installs a browser-side crypto.randomUUID() compatibility method when an HTTP origin provides crypto.getRandomValues() but not randomUUID(). This keeps Harness workspace RPC calls usable on ordinary LAN HTTP pages without changing the DeepSeek Harness repository.

Security model

• The primary Web server stays on loopback. A separate authenticated proxy listens on all interfaces for LAN mode and loopback only for tunnel mode.
• HTTP and WebSocket requests without a valid cookie receive 401 at the authenticated proxy.
• server.token is a secret Harness setting. It is written only to a 0600 TOML file in a random private directory and never appears in argv, browser responses, or access links.
• The control API accepts only a loopback socket, loopback Host, and same-origin browser context. Remote browsers reach it only through the authenticated proxy, which rewrites the upstream request to loopback.
• Treat each access link as a bearer credential. Do not post it in chat, tickets, or logs. Disable and re-enable remote access if a link may have leaked.

Develop

pnpm install
pnpm run typecheck
pnpm run test
pnpm run build

pnpm pack creates a prebuilt archive installable with dsh plugin --profile web add ./xiaosenho-dsh-plugin-remote-access-0.1.2.tgz.